ZABEL, M and HEYNS, AM and KLEYNHANS, A and RANGE, KJ (1994) SOLID-STATE REACTIONS AND THERMAL-DECOMPOSITION OF 2 AMMONIUM PEROXOVANADATES [(NH4)4V2O11 AND (NH4)[VO(O2)2(NH3)]]. MATERIALS RESEARCH BULLETIN, 29 (4). pp. 343-349. ISSN 0025-5408,
Full text not available from this repository.Abstract
The decomposition of two peroxovanadate compounds, ammonium mu-oxo-bis(oxodiperoxovanadate(V)), (NH4)4[O{VO(O2)2}2], (NH4)4V2O11, and ammonium ammine-oxodiperoxo-vanadate(V), (NH4)[VO(O2)2(NH3)], has been investigated by means of X-ray powder diffraction, infrared and thermal analysis measurements. Above 100-degrees-C (NH4)4V2O11 is fully decomposed to (NH4)[VO(O2)2(NH3)] according to the reaction (NH4)4V2O11 reversible 2 (NH4)[VO(O2)2(NH3)] + H2O. Powder diffraction X-ray and infrared results show clearly that the forward reaction proceeds above 100-degrees-C and the backward reaction even at room temperature upon the addition of water to (NH4)[VO(O2)2(NH3)]. The latter compound decomposes to NH4VO3 at approximately 150-degrees-C. Upon standing at ambient conditions, a measure of decomposition of (NH4)4V2O11 also occurs, and because of this solid state reaction the mass loss found during the decomposition of ''(NH4)4V2O11'' can be lower than the calculated value.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CRYSTAL-STRUCTURE; (NH4)4<O(VO(O2)2)2>; PEROXOVANADATES; AMMONIUM |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/53378 |
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